Modified polypropylene composite material and preparation method thereof

Abstract

The invention discloses a modified polypropylene composite material and a preparation method thereof. The modified polypropylene composite material is prepared from polypropylene, a butylbenzene thermoplastic elastomer, powdered steatile and dicumyl peroxide according to a mass ratio of 9: 1: 1: 0.3-0.4. The preparation method comprises adding polypropylene, a butylbenzene thermoplastic elastomer and powdered steatile into an internal mixer, carrying out primary internal mixing at a temperature of 165-170 DEG C at a rotation rate of 50-60rpm for 3-5min, adding 3-4 parts by weight of dicumyl peroxide into the mixture, carrying out secondary internal mixing at a temperature of 150-155 DEG C at a rotation rate of 40-45rpm for 3-5min, taking out the mixture in the internal mixer and carrying out granulation on the mixture. The modified polypropylene composite material has high shock resistance, good stretching performances, high bending strength and a high Vicat softening point.

Description

technical field [0001] The invention relates to the field of modification of polypropylene composite materials. More specifically, the present invention relates to a modified polypropylene composite material and a preparation method thereof. Background technique [0002] Polypropylene (PP) is one of the important polymer materials. It has the advantages of low density, good processing performance, good tensile strength and modulus, so it is widely used in many fields. However, PP also has shortcomings, such as poor impact resistance at room temperature and low temperature, poor heat resistance, etc. Many researchers have modified the performance of PP. The impact performance and heat resistance of PP are improved by adding inorganic materials such as calcium carbonate, montmorillonite, and glass fiber, but the compatibility between PP and inorganic materials is poor, so surface modification of inorganic materials is required to improve PP / Compatibility issues with inorgan...

AI Technical Summary

Problems solved by technology

However, PP also has shortcomings, such as: poor room temperature and low temperature impact resistance, poor heat resistance, etc. Many researchers have modified the properties of PP.

The impact performance and heat resistance of PP are improved by adding inorganic materials such as calcium carbonate, montmorillonite, and glass fiber, but the compatibility between PP and inorganic materials is poor, so surface modification of inorganic materials is required to improve PP / Compatibility issues with inorganic materials

On the other hand, the addition of inorganic materials and elastomers will also reduce the fluidity of PP processing, which is not conducive to processing, and the existing polypropylene composite materials are complicated to prepare, use a variety of raw materials, and have high costs. Therefore, , the development of a modified polypropylene composite material with simple preparation process, less raw materials, low cost, excellent impact resistance and toughness has broad market prospects

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